javascript - 使 Bootstrap 进度条从 0 到 100% 动画

Question

我正在使用 Twitter Bootstrap 构建我的网页。

我有这个 HTML 代码:

<div class="btn-group">
    <button type="button" class="btn btn-success">Connect</button>
    <button type="button" class="btn btn-success dropdown-data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
        <span class="caret"></span>
        <span class="sr-only">Toggle Dropdown</span>
    </button>
    <ul class="dropdown-menu">
        <li><a href="#"> Connect 1</a></li>    
        <li role="separator" class="divider"></li>
        <li><a href="#"> Connect 2</a></li>
    </ul>
</div>

<div class="progress">
    <div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 0%;"></div>
</div>

<div class="alert alert-success" role="alert">Well done! You successfully connected. <a href="#step2" class="alert-link">Next</a></div>

当用户按下连接按钮或按下下拉按钮(两个之一)时，我想将进度条从 0 设置为动画，当进度条达到 100% 时，脚本会显示之前隐藏的警报。

Answer 1

这就是创建动画进度条所需的全部:

var $progressBar = $('.progress-bar').css('width', '80%');

此特定代码将使进度条从当前值动画化到 80% 的值。

---

演示

var $progress = $('.progress');
var $progressBar = $('.progress-bar');
var $alert = $('.alert');

setTimeout(function() {
    $progressBar.css('width', '10%');
    setTimeout(function() {
        $progressBar.css('width', '30%');
        setTimeout(function() {
            $progressBar.css('width', '100%');
            setTimeout(function() {
                $progress.css('display', 'none');
                $alert.css('display', 'block');
            }, 500); // WAIT 5 milliseconds
        }, 2000); // WAIT 2 seconds
    }, 1000); // WAIT 1 seconds
}, 1000); // WAIT 1 second

.progress, .alert {
    margin: 15px;
}

.alert {
    display: none;
}

<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script type="text/javascript" src="https://code.jquery.com/jquery-1.12.1.min.js"></script>
<div class="progress">
    <div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 0%;"></div>
</div>

<div class="alert alert-success" role="alert">Well done! You successfully connected. <a href="#step2" class="alert-link">Next</a></div>

(另见 this Fiddle)